EP 0312788 A3 19900801 - DEVICE FOR MEASUREMENT OF VISUAL RANGE
Title (en)
DEVICE FOR MEASUREMENT OF VISUAL RANGE
Publication
Application
Priority
DE 3735267 A 19871017
Abstract (en)
[origin: JPH01134232A] PURPOSE: To evaluate rear scattering generated at the outside of a front window glass of the operation room of an automobile and rear scattering generated due to contamination at the location of the front window glass by providing a light emitting equipment and a photosensor at the inside of the front window glass. CONSTITUTION: A light emitting equipment 1 and a photosensor 2 are provided at a rear-viewing mirror at the inside of a front window glass 3 of an automobile. The light emitting equipment 1 generates a short light pulse, the rays are directed to nearly the driving direction of the automobile, and one portion of the emitted light is reflected and scattered depending on the degree of the contamination of the front window glass 3. Also, when the automobile drives through a mist region or a sight condition is limited due to, for example, smoke, one portion of the light of the light emitting equipment 1 is further reflected and scattered and partially enters the photosensor 2. A signal processing device 9 distinguishes rays that are reflected and scattered from the front window glass 3 from those that are reflected and scattered from a scattering region 7 for evaluation.
IPC 1-7
IPC 8 full level
B60K 35/00 (2006.01); B60Q 1/52 (2006.01); G01N 21/00 (2006.01); G01N 21/47 (2006.01); G01N 21/49 (2006.01); G01N 21/53 (2006.01); G01S 17/88 (2006.01); G01S 17/95 (2006.01)
CPC (source: EP US)
B60Q 9/00 (2013.01 - EP US); G01N 21/538 (2013.01 - EP US); G01N 2021/1791 (2013.01 - EP US); G01N 2021/4709 (2013.01 - EP US)
Citation (search report)
- [A] AT 10681 B 19030210 - ELECTRIC LIGHTING BOARDS LTD
- [A] AT 22179 B 19051125 - BUCKINGHAM CHARLES LUMAN [US]
- [AD] DE 2427623 A1 19751218 - STRAILE FRITZ DIPL ING
- [AD] DE 2328092 A1 19731213 - SPERRY RAND CORP
- [A] BEITR|GE ZUR PHYSIK DER ATMOSPH|RE, Band 37, Heft 3/4, 1964 Akadem. Verlagsgesellschaft Frankfurt am Main; RUPPERSBERG G.H. "Registrie- rung der Sichtweite mit dem Streulichtschreiber" Seiten 252-263
Designated contracting state (EPC)
DE ES FR GB IT SE
DOCDB simple family (publication)
EP 0312788 A2 19890426; EP 0312788 A3 19900801; EP 0312788 B1 19931215; DE 3735267 A1 19890427; DE 3735267 C2 19900823; DE 3735267 C3 19960321; DE 3886338 D1 19940127; ES 2049233 T3 19940416; JP H01134232 A 19890526; JP H0675036 B2 19940921; US 4931767 A 19900605
DOCDB simple family (application)
EP 88115442 A 19880921; DE 3735267 A 19871017; DE 3886338 T 19880921; ES 88115442 T 19880921; JP 25746388 A 19881014; US 25846588 A 19881017